JP2021532363A - Manifold - Google Patents

Abstract

Manufactures of manifolds (400, 600, 700) with reduced vortex disengagement, vibrating meters (5) including them, and both methods are described. Manifolds (400, 600, 700) are provided between the first conduit section (202), the second conduit section (204), and between the first conduit section (202) and the second conduit section (204). A first splitter surface (408a, 608a, 708) that is an arranged splitter section (406, 606, 706) and faces a first conduit section (202), and at least a part thereof is a first splitter surface. It comprises a splitter section (406, 606, 706) comprising a first projection (412a, 612a, 712) located at (408a, 608a, 708). [Selection diagram] FIG. 4

Description

The examples described below relate to manifolds and methods of manufacturing manifolds. More specifically, an example relates to a manifold with a splitter including protrusions.

The double-conduit Coriolis mass flow meter operates by detecting the movement of a pair of vibrating conduits or vessels containing fluid material. Properties related to the material within the conduit, such as mass flow rate, density, can be determined by processing the measurement signal received from the pick-off or motion transducer associated with the conduit.

The vibrometer can include an assembly with a straight or curved conduit. As the material begins to flow through the conduit, the Coriolis force causes the points along the conduit to be out of phase. For example, the phase of the inlet end of the flow meter lags behind the phase of the central driver position, but the phase of the exit is ahead of the phase of the central driver position. The pick-off of the conduit produces a sinusoidal signal that represents the movement of the conduit. The signal output from the pickoff is processed to determine the time delay between the pickoffs. The time delay between two or more pickoffs is proportional to the mass flow rate of the material flowing through the conduit.

Meter electronics connected to the driver operate the driver to generate a drive signal from the signal received from the pickoff to determine the mass flow rate and / or other characteristics of the process material. The driver can include any of many well-known devices, but magnets and opposed drive coils are one of the most common types. Alternating current is passed through the drive coil to vibrate the conduit at the desired amplitude and frequency of the conduit. Pickoff often also includes a magnetic and coil device similar to a driver.

The double conduit Coriolis sensor divides the flow into two paths at the inlet manifold, provides one flow for each conduit and recombines to the flow at the second manifold in front of the sensor outlet. Convergence of the two channels in the second manifold in front of the outlet often occurs with a larger transition volume that matches the diameter of the process pipeline. When recombinated, the two channels flow over the manifold splitter, which is the rear end of the manifold. Flow on the splitter can cause vortex separation in the fluid flow, especially when measuring gas flow. Vortex withdrawal is an oscillating flow that occurs when a fluid, such as air or water, flows too far through a blunt body at a particular speed, depending on the size and shape of the body. Vortex withdrawal can also cause vibration and unwanted audible noise.

Therefore, there is a need for a manifold for Coriolis flowmeters with reduced vortex separation and acoustic noise.

According to the first aspect, a manifold with reduced vortex separation is provided. The manifold is a splitter section arranged between a first conduit section, a second conduit section, a first conduit section and a second conduit section, and a first facing the first conduit section. It comprises a splitter section that includes a splitter surface and a first protrusion that is at least partially located on the first splitter surface.

According to the second aspect, there is provided a method for manufacturing a manifold in which vortex separation is reduced. The method is a splitter section arranged between a step of forming a first conduit section, a step of forming a second conduit section, and a first conduit section and a second conduit section. A step of forming a splitter section including a first splitter surface facing the first conduit section and a step of forming a first protrusion whose at least a part thereof is arranged on the first splitter surface are included.
(Aspect)
In a further aspect, the first protrusion may have a rounded shape.

In a further aspect, the first protrusion may have an elongated shape.

In a further aspect, the first protrusion can include a recessed area.

In a further aspect, the first protrusion can extend beyond the edge of the splitter section.

In a further aspect, the splitter section may further include a second splitter surface facing the second conduit section, the manifold having at least a second protrusion having at least a portion thereof located on the second splitter surface. Can be further included.

In a further aspect, the first protrusion may be of the first size and the second protrusion may be of the second size.

In a further aspect, the first protrusion may be of the first shape and the second protrusion may be of the second shape.

In a further aspect, the manifold may further include at least one additional protrusion located on at least one of the first splitter surface or the second splitter surface.

In a further aspect, a vibrometer with a manifold according to the first aspect is provided. The vibrometer is coupled to a pickoff coupled to at least one of a first conduit, a second conduit, a first conduit or a second conduit, and to at least one of the first or second conduits. You can further prepare for the driver.

In a further aspect, the first protrusion may have a rounded shape.

In a further aspect, the first protrusion may have an elongated shape.

In a further aspect, the first protrusion can include a recessed area.

In a further aspect, the first protrusion can extend beyond the edge of the splitter section.

In a further aspect, the splitter section may further include a second splitter surface facing the second conduit section, the method comprising forming a second protrusion located on the second splitter surface. Further can be included.

In a further aspect, the first protrusion may be of the first size and the second protrusion may be of the second size.

In a further aspect, the first protrusion may be of the first shape and the second protrusion may be of the second shape.

In a further aspect, there is provided a method of manufacturing a vibrometer with a manifold manufactured according to the second aspect. The method comprises connecting the first conduit section of the manifold to the first conduit, connecting the second conduit section of the manifold to the second conduit, and picking off the first or second conduit. A step of connecting to at least one of the conduits and a step of connecting the driver to at least one of the first or second conduits so that the driver vibrates the first and second conduits. Can further include steps configured in.

The same reference number represents the same element in all drawings. The drawings are not always on scale.
It is a figure which shows the vibration flow meter by an example. It is a figure which shows the perspective view of the manifold. It is a figure which shows the perspective sectional view of the manifold. It is a figure which shows the perspective sectional view of the manifold by one example. It is a figure which shows the perspective view of the manifold by one example. It is a figure which shows the perspective view of the manifold by one example. It is a figure which shows the perspective view of the manifold by one example. It is a figure which shows the method by an example. It is a figure which shows the method by an example.

The present application describes a manifold with reduced vortex disengagement, a vibration meter including the manifold, and a method for manufacturing both the manifold and the vibration meter.

FIG. 1 shows an example vibration meter 5 with a manifold 150. As shown in FIG. 1, the vibration meter 5 includes a meter assembly 10 and a meter electronic device 20. The meter assembly 10 responds to the mass flow rate and density of the process material. The meter electronics 20 are connected to the meter assembly 10 via a lead 100 to provide density, mass flow, and temperature information, as well as other information, via a communication path 26. Information and commands may be further received by the meter electronic device 20 via the communication path 26.

The structure of the Coriolis flowmeter is described, but it is not intended to be limited. Those skilled in the art will readily appreciate that this application can be implemented as a vibrating tube densitometer, tuning fork densitometer, etc.

The meter assembly 10 includes a pair of manifolds 150 and 150', flanges 103 and 103', a pair of parallel first and second conduits 130 and 130', a screwdriver 180, a pair of pick-off sensors 170l and 170r, and a case 190. include.

The first and second conduits 130, 130'bend at two symmetrical positions along their length and are essentially parallel over their length.

The brace bars 140 and 140'help define the axis (not shown) around which the first and second conduits 130, 130', respectively, oscillate. The legs of the first and second conduits 130, 130'are firmly attached to the manifolds 150 and 150'. This results in a continuous closed material path through the meter assembly 10.

When the flanges 103 and 103'are connected to a process line (not shown) carrying the process material, the material enters the inlet end 104 of the meter through the orifice of the flange 103 and is guided through the manifold 150. Within the manifold 150, the material is split and fed through the first and second conduits 130, 130'. Upon exiting the first and second conduits 130, 130', the process material is recombinated into a single stream within the manifold 150'and then sent to the outlet end 104', which is the process line (not shown). ).

The case 190 surrounds at least a portion of the conduits 130, 130', the driver 180, and the pickoffs 170l, 170r. Manifolds 150 and 150'can be coupled to the case 190.

The first and second conduits 130, 130'are selected to have substantially the same mass distribution, moment of inertia, and Young's modulus around their bending axes, as defined by the brace bars 140, 140'. NS.

Both the first and second conduits 130, 130'are driven by the driver 180 in opposite directions around each bend axis and in the so-called first out-of-phase bend mode of the flow meter. The driver 180 may include, for example, a magnet attached to the first conduit 130'and an opposed coil attached to the second conduit 130. Alternating current is passed through the coil, causing both the first and second conduits 130, 130'to vibrate. A suitable drive signal is applied to the driver 180 by the meter electronics 20 via the lead 185.

The meter electronic device 20 receives the left and right pick-off signals generated in the leads 165l and 165r, respectively. The meter electronic device 20 supplies a signal via the lead 185 and vibrates the first and second conduits 130, 130'via the driver 180. The left and right pick-off 170l, 170r signals are used by the meter electronics 20 to calculate the mass flow rate and / or the density of the material flowing through the meter assembly 10. This information, along with other information, may be transmitted by the meter electronic device 20 via the communication path 26.

Although FIG. 1 shows a single meter assembly 10 communicating with the meter electronics 20, one of ordinary skill in the art will readily appreciate that multiple sensor assemblies can communicate with the meter electronics 20. In addition, the meter electronics 20 may be capable of activating various sensor types. Each sensor assembly, such as the meter assembly 10 that communicates with the meter electronics 20, may have a dedicated section of the storage system within the meter electronics 20.

Meter electronics 20 can include various other components and functions, as will be appreciated by those skilled in the art. These additional features may be omitted from the description and figures for brevity and clarity.

2 and 3 show a manifold 200 according to a conventional method (FIG. 2 shows a perspective view and FIG. 3 shows a cross-sectional view). As can be seen, the manifold 200 includes a first conduit section 202, a second conduit section 204, a splitter section 206 between the first and second conduit sections 202, 204, and a combined flow section 208. The first and second conduit sections 202 and 204 can be coupled to the respective conduits 130, 130', respectively. The combined flow section 208 is fluidly coupled to the first conduit section 202 and the second conduit section 204.

The conventional manifold splitter section 206 provides a smooth transition between the flow sections 208 combined with the first and second conduit sections 202, 204. The conventional splitter section 206 includes an edge 210 having a uniform end radius and thickness over the entire length of the splitter between the first and second conduit sections 202 and 204. The blunt end of the edge 210 can result in eddying and flow noise, especially if the manifold 200 is installed in a gas pipeline.

FIG. 4 shows a cross-sectional view of the manifold 400 according to the example of the present application. Manifold 400 also includes a first conduit section 202, a second conduit section 204, and a combined flow section 208. However, the manifold 400 is different from the manifold 200 because it includes a splitter section 406 disposed between the first conduit section 202 and the second conduit section 204. Splitter section 406 includes edge 410.

The splitter section 406 includes a first splitter surface 408a facing the first conduit section 202. The first splitter surface 408a is a surface arranged on the side of the first conduit section 202 of the edge 410. In the example, the first splitter surface 408a can include a saddle-shaped surface cross section. In a further example, the first splitter surface 408a can include a cone, a plane, or a cross section of any other shape known to those of skill in the art.

The manifold 400 further includes a first projection 412a, of which at least a portion thereof is located on the first splitter surface 408a. The first projection 412a can help disrupt or disrupt the fluid flow in the splitter section 406, resulting in the separation of the fluid into a flow that produces less coherent vortices.

In the example, the first protrusion 412a may have a rounded shape. For example, as shown in FIGS. 4 and 5, the first protrusion 412a includes a cross section of the sphere.

In the example, the manifold 400 can be located at the outlet end 104'of the meter assembly 10. In a further example, the manifold 400 may instead be located at another point in the process path where the two channels merge into a single channel, such as the downstream end of the Y fitting where the two channels converge. .. However, in a further example, the manifold 400 can be located at the inlet end 104. Other positions of the manifold 400 are also possible, as will be appreciated by those of skill in the art.

In the example, as seen in FIG. 5, the splitter section 406 of the manifold 400 has a second splitter surface 408b facing the second conduit section 204 and a second protrusion located on the second splitter 408b surface. 412b and can be further provided. Like the first protrusion 412a, the second protrusion 412b can also be round. However, in a further embodiment, the second projection 412b can be of any shape that can operate to disrupt the fluid flow in the splitter section 406.

In the example, the first and second protrusions 412a and 412b may have the same shape or different shapes. In a further example, the first and second protrusions 412a and 412b may be the same size or different sizes. By providing two differently shaped or sized protrusions, it may be possible to further disrupt the fluid flow on the splitter section 406.

In a further example, the first protrusion 412a can be square, oval, irregular, or any other shape. For example, FIG. 6 shows a perspective view of the manifold 600. The manifold 600 includes a splitter section 606 and an edge 610. The splitter section 606 includes a first protrusion 612a, of which at least a portion thereof is located on the first splitter surface 608a. The first protrusion 612a has an elongated shape that is arranged such that the longest dimension is substantially parallel to the edge 610. By providing the elongated first projection 612a, the manifold 600 can be further helped to disrupt the fluid flow on the splitter section 606.

In the example, the first protrusion 612a can include a first recessed region 614a. The recessed region 614a can further help reduce the formation of flows that may generate coherent vortices in the manifold 600.

In the example, the manifold 600 may further include a second protrusion 612b disposed on the second splitter surface 608b. The second protrusion 612b can include a second recessed region 614b that can operate to reduce the formation of coherent vortices. In the example, the first and second protrusion regions 614a and 614b can form saddle-shaped features in the splitter section 606, as shown in FIG.

FIG. 7 further shows an exemplary manifold 700 including a splitter section 706. The splitter section 706 includes a first protrusion 712 located on the first splitter surface 708. The first protrusion 712 extends beyond the edge 710 in the direction of the combined flow section 208. Since the first protrusion 712 extends beyond the edge 710, it can help disturb the fluid flow on either side of the splitter section 706. In the example, the manifold 700 may further include a second protrusion (not shown).

Examples of one or two protrusions are provided, but those skilled in the art will readily appreciate that a manifold 400, 600, or 700 can include three or more protrusions. ..

FIG. 8 shows a method 800 that can be performed to manufacture a manifold with reduced vortex disengagement.

Method 800 begins with steps 802 and 804. In step 802, the first conduit section 202 is formed, and in step 804, the second conduit section 204 is formed.

Method 800 follows step 806. In step 806, splitter sections 406, 606, 706 are formed and placed between the first conduit section 202 and the second conduit section 204, with the splitter sections 406, 606, 706 being the first conduit section 202. Includes first splitter surfaces 408a, 608a facing the surface.

Method 800 follows step 808. In step 808, the first protrusions 412a, 612a, 712 are formed and arranged on the first splitter surfaces 408a, 608a.

In the example, method 800 can further include step 810. In step 810, the second projections 412b, 612b may be formed and placed on the second splitter surfaces 408b, 608b.

In the example, any of the first or second conduit sections 202, 204, splitter sections 406, 606, 706, first protrusions 412a, 612a, 712, or second protrusions 412b, 612b are machined, cast, It can be formed by welding, three-dimensional printing or any other manufacturing technique known to those of skill in the art. In the example, the manifolds 400, 600, 700 can be formed as a single integrated body, or the first or second conduit sections 202, 204, splitter sections 406, 606, 706, first protrusions 412a. , 612a, 712, or any portion of the second projections 412b, 612b can be formed separately and connected via welding, brazing, glue, etc. to form manifolds 400, 600, 700. ..

FIG. 9 shows a method 900 that can be performed according to any step of the method 800 to manufacture a vibrating meter with a manifold with reduced vortex disengagement.

Method 900 begins with steps 902 and 904. In step 902, the first conduit section of the manifold is coupled to the first conduit. In step 904, the second conduit section of the manifold is coupled to the second conduit. For example, the first conduit section 202 can be coupled to the first conduit 130 and the second conduit section 204 can be coupled to the first conduit 130. In the example, the first or second conduits 130, 130'can be coupled to the manifolds 400, 600, 700 via welding, brazing, or glue, as will be appreciated by those skilled in the art.

Method 900 follows step 906. In step 906, the pickoff is coupled to at least one of the first conduit 130 or the second conduit 130'. For example, the left and right pickoffs 170l, 170r can be welded, brazed, glued, or otherwise attached to each first conduit 130 or second conduit 130', respectively.

Method 900 follows step 908. In step 908, the driver 180 is coupled to at least one of the first and second conduits 130', and the driver 180 is configured to vibrate the first and second conduits 130'. Has been done. For example, the driver 180 can be welded, brazed, glued, or otherwise attached to the first conduit 130 and / or the second conduit 130'.

The manifolds, vibration meters, and both manufacturing methods described herein can help reduce vortex separation, thereby reducing audible noise and vibration caused by fluid flow in the Coriolis flow meter. be able to.

The detailed description of the above examples is not an exhaustive description of all the examples that the inventor considers to be within the scope of the present application. In fact, one of ordinary skill in the art can create additional examples by variously combining or excluding certain elements of the above examples, which are within the scope and teaching of the present application. Will recognize. It will also be apparent to those skilled in the art that additional examples can be created by combining the above examples in whole or in part, within the scope of the present application and within the teachings. Therefore, the scope of this application should be determined from the following claims.

Claims (19)

Manifolds (400, 600, 700) with reduced vortex disengagement,
The first conduit section (202) and the second conduit section (204),
A first splitter section (406, 606, 706) located between a first conduit section (202) and a second conduit section (204) facing the first conduit section (202). The splitter section (406, 606, 706) including the splitter surfaces (408a, 608a, 708) of the
Manifolds (400, 600, 700) comprising first projections (412a, 612a, 712), of which at least a portion thereof is located on the first splitter surface (408a, 608a, 708). The manifold (400, 600, 700) according to claim 1, wherein the first protrusion (412a, 612a, 712) has a round shape. The manifold (400, 600, 700) according to claim 1 or 2, wherein the first protrusion (612a) has an elongated shape. The manifold (400, 600, 700) according to any one of claims 1 to 3, wherein the first protrusion (612a) includes a recessed region (614a). The manifold (400, 600, 700) according to any one of claims 1 to 4, wherein the first protrusion (712) extends beyond the edge (710) of the splitter section (706). The splitter section (406, 606, 706) further includes a second splitter surface (408b, 608b) facing the second conduit section (204).
25. The manifold (400, 600, 700) according to any one of the above. The manifold (400, 600, 700). The manifold (400, 4. 600, 700). 17. The manifold (400, 600, 700) according to any one of the following items. A vibration meter including the manifold (400, 600, 700) according to any one of claims 1 to 9.
The first conduit (130) and
The second conduit (130') and
With a pickoff (170 l, 170r) coupled to at least one of the first conduit (130) or the second conduit (130').
A vibration meter further comprising a driver (180) coupled to at least one of the first conduit (130) or the second conduit (130'). A method for manufacturing manifolds (400, 600, 700) with reduced vortex separation.
With the step of forming the first conduit section (202),
With the step of forming the second conduit section (204),
The splitter section (406, 606, 706) disposed between the first conduit section (202) and the second conduit section (204) facing the first conduit section (202). A step of forming a splitter section (406, 606, 706) comprising a splitter surface (408a, 608a, 708) of 1.
A manufacturing method comprising the step of forming a first projection (412a, 612a, 712), at least a portion thereof, arranged on the first splitter surface (408a, 608a, 708). The manufacturing method according to claim 11, wherein the first protrusion (412a, 612a, 712) has a round shape. The manufacturing method according to claim 11 or 12, wherein the first protrusion (412a, 612a, 712) has an elongated shape. The production method according to any one of claims 11 to 13, wherein the first protrusion (412a, 612a, 712) includes a recessed region (614a). The manufacturing method according to claim 11 or 12, wherein the first protrusion (712) extends beyond the edge (710) of the splitter section (706). The splitter section (406, 606, 706) further includes a second splitter surface (408b, 608b) facing the second conduit section (204).
The manufacturing method according to any one of claims 11 to 13, further comprising a step of forming a second protrusion (412b, 612b) arranged on the second splitter surface (408b, 608b). The manufacturing method according to claim 16, wherein the first protrusion (412a, 612a, 712) is the first size, and the second protrusion (412b, 612b) is the second size. The manufacturing method according to claim 16 or 17, wherein the first protrusions (412a, 612a, 712) have a first shape, and the second protrusions (412b, 612b) have a second shape. The method for manufacturing a vibration meter (5) comprising a manifold (400, 600, 700) with reduced vortex separation according to any one of claims 11 to 18, further comprising the manifold (400, 600, 700, The step of connecting the first conduit section (202) of 700) to the first conduit (130),
With the step of connecting the second conduit section (204) of the manifold (400, 600, 700) to the second conduit (130').
With the step of connecting the pickoff (170 l, 170r) to at least one of the first conduit (130) or the second conduit (130').
The step of connecting the driver (180) to at least one of the first conduit (130) or the second conduit (130'), wherein the driver (180) is the first conduit (130). And a manufacturing method comprising a step configured to vibrate the second conduit (130').

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